Electrophoretic display and driving method thereof

Abstract

An electrophoretic display and a driving method thereof are provided. The electrophoretic display includes a display panel, a storage unit and a timing controller. The display panel has a plurality of sub pixels. The storage unit stores a plurality of sets of multiple-grayscale driving waveforms, in which the driving voltage scales of driving waveforms corresponding to a same grayscale in the sets of multiple-grayscale driving waveforms are different from each other. The timing controller is coupled to the storage unit and the display panel and receives an image signal, and when the image signal transmits a multiple-grayscale frame, the timing controller sequentially adopts the sets of multiple-grayscale driving waveforms to drive the sub pixels.

1 . An electrophoretic display, comprising:
 a display panel, having a plurality of sub pixels;   a storage unit, storing a plurality of sets of multiple-grayscale driving waveforms, wherein the driving voltage scales of driving waveforms corresponding to a same grayscale in the sets of multiple-grayscale driving waveforms are different from each other; and   a timing controller, coupled to the storage unit and the display panel and receiving an image signal, wherein when the image signal transmits a multiple- grayscale frame, the timing controller sequentially adopts the sets of multiple-grayscale driving waveforms to drive the sub pixels.   
     
     
         2 . The electrophoretic display as claimed in  claim 1 , wherein the sequence for the timing controller to adopt the sets of multiple-grayscale driving waveforms is alternate forward-reverse. 
     
     
         3 . The electrophoretic display as claimed in  claim 1 , wherein the sequence for the timing controller to adopt the sets of multiple-grayscale driving waveforms is cycling in sequence. 
     
     
         4 . The electrophoretic display as claimed in  claim 1 , wherein a plurality of sub pixels adjacent to each other along a first direction in the sub pixels are driven by using a same set of multiple-grayscale driving waveforms. 
     
     
         5 . The electrophoretic display as claimed in  claim 4 , wherein the first direction is a vertical direction. 
     
     
         6 . The electrophoretic display as claimed in  claim 4 , wherein the first direction is a horizontal direction. 
     
     
         7 . The electrophoretic display as claimed in  claim 1 , wherein each of the sub pixels and the adjacent sub pixels are driven by using different sets of multiple-grayscale driving waveforms. 
     
     
         8 . The electrophoretic display as claimed in  claim 1 , wherein the timing controller comprises:
 an analysis unit, receiving the image signal for judging whether or not the image signal transmits a multiple-grayscale frame; and   a dithering unit, coupled to the analysis unit, wherein when the image signal transmits a multiple-grayscale frame, the dithering unit sequentially adopts the sets of multiple-grayscale driving waveforms to drive the sub pixels.   
     
     
         9 . The electrophoretic display as claimed in  claim 1 , wherein when the image signal transmits a two-grayscale frame, the timing controller adopts a set of two-grayscale driving waveforms stored in the storage unit to drive the sub pixels. 
     
     
         10 . The electrophoretic display as claimed in  claim 1 , further comprising:
 a signal processing unit, coupled to the timing controller and receiving a video signal so as to produce the image signal according to the video signal.   
     
     
         11 . A driving method of an electrophoretic display, comprising:
 receiving an image signal; and   when the image signal transmits a multiple-grayscale frame, sequentially adopting a plurality of sets of multiple-grayscale driving waveforms to drive a plurality of sub pixels of a display panel of the electrophoretic display, wherein the driving voltage scales of driving waveforms corresponding to a same grayscale in the sets of multiple-grayscale driving waveforms are different from each other.   
     
     
         12 . The driving method of an electrophoretic display as claimed in  claim 11 , wherein the adopted sequence by the sets of multiple-grayscale driving waveforms is alternate forward-reverse. 
     
     
         13 . The driving method of an electrophoretic display as claimed in  claim 11 , wherein the adopted sequence by the sets of multiple-grayscale driving waveforms is cycling in sequence. 
     
     
         14 . The driving method of an electrophoretic display as claimed in  claim 11 , further comprising:
 when the image signal transmits a two-grayscale frame, adopting a set of two-grayscale driving waveforms to drive the sub pixels.